Band-clutch.



R. HUFF.

BAND CLUTCH.

APPLIGATIOH FILED mums, 1909 1 z & m 1L M .Um no hm d m n m L, f A a 6 wF u Rm 1 5 I, 8 9 9 wi lmeogw R. HUFF.

BAND GLUTGH.

APPLICATION FILED rmza, 1909.

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COLUMBIA PLANOORAPH c0" WASHINGTD N. n. C.

UNTTEI) STATES PATENT OFFICE.

RUSSELL HUFF, 0F DETROIT, MICHIGAN, ASSIGNOR, BY MESNE ASSIGNMENTS, TOPACKARD MOTOR CAR COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OFMICHIGAN.

BAND-CLUTCH.

Specification of Letters Patent.

Patented July 18, 1911.

Application filed February 25, 1909. Serial No. 479,966.

To all whom it may concern:

Be it known that I, RnssnLL Herr, a citizen of the United States, andresident of De troit, in the county of Wayne and State of hliichigan,have invented certain new and useful Improvements in Band-Clutches, ofwhich the following is a specification.

This invention relates to band clutches, and is shown applied to thedriven shaft and fly wheel of a motor vehicle, but it will be understoodthat its features of construction are applicable to other uses. Itsobject is to irn-Q prove the means for operating the clutch,

and it consists in the novel features, which will be apparent from thefollowing description, taken in connection with the drawings.

In the drawings :Figure 1 is an eleva tion partly in section showing adevice having my invention applied thereto; Fig.2 is a sectional viewupon the line 2-2, of Fig. 1; Fig. 3 is a sectional View upon the line33 of Fig. 2; Fig. 4!: is an enlarged detail view of the operatingsleeve and wedges; Fig. 5 is an enlarged sectional view of an adjustableroller on the operating lever; and Fig. 6 is a sectional view upon theline 66 of Fig. 1.

In the drawings, 1 represents the driven shaft of a motor vehicle and 2represents the fly wheel, which is adapted to be connected to the drivenshaft by my improved clutch mechanism hereafter described. At the end ofthe shaft 1 there is a ball bearing connection 3 between it and the flywheel. The fly wheel 2 has a cylindrical portion pro vided with aninterior brake surface 4, and a clutch drum 5 is mounted within thisbrake surface and adjacent thereto, this clutch drum being connected tothe shaft 1 by the web 6 which is secured by bolts 53, to the flange 54:formed on the shaft 1. A steel band 7 made in the form of a split ringsurrounds the drum 5, and one end of this band is anchored to the web 6at S. This band is provided with a suitable covering, such as leather,9, adapted to engage the surface a and clutching the parts together, soas to make the drum 5 and the fly wheel 2 move together. The free end 10of the clutch band 7 is adapted to be moved positively into and out ofengagement with the surface 4 by means hereafter described, and in orderto prevent the shocks and jars which would result from having the freeend of the band first make contact with the surface 4, a spring 11 issecured to the drum 5 and bears outwardly upon the band at a pointnearer its anchored end, whereby the band will commence to make contactwith the surface 4 near its anchored end and this contact will graduallyextend to the free end of the band.

The free end of the band 7 is operated by a lever 12 pivotally mountedat 13 and having pivotally secured to its upper end at lt a connectinglink 15, which is screw threaded and adapted to pass through an openingmade laterally in the pivot pin 16, which is secured to the free end ofthe band 7. A spring 17 is secured to the web 6 and to the free end ofthe band, thereby tending to draw the band in against the drum and outof contact with the surface 4. The lever 12 is made up of two relativelymovable sections 18 and 19, the lower section 19 being bifurcated andthe two arms 20, 21 of this section being provided at their lower endswith rollers 22, 23, adapted to engage upon opposite sides the wedges24:, 25 which together constitute a parallel sided cam surface carriedby the sleeve mounted to slide longitudinally on the shaft 1. The sleeve26 is keyed to the shaft 1, so that it willrotate therewith, as shown at27, and this sleeve has the circular flanges 28 forming a channel toengage the end of the operating lever 29 pivoted at 30. It will beunderstood that this lever is adapted to move the sleeve 26longitudinally of the shaft 1, while that shaft is rotated, and that thespring 31 tends to force the sleeve inward toward the fly wheel, thusmoving the clutch band 7 outward against the surface 4:. In order tomake the rollers 22 and 23 properly fit the wedges 24, 25, these rollersare mounted on eccentric sleeves 32, which are rotatable on the ends 33,of the arms 20, 21. These sleeves may be adjusted to proper position byscrews 34 engaging in notches 35 in the sleeves. This adjustability ofthe rollers makes it possible to compensate for wear, and to bring theminto proper engagement with the cam surface on both sides.

By reference particularly to Fig. 2, it will be seen that the section 19of the operating lever 12 is made with an upper cylindrical portion 36which surrounds the sleeve 37 carried by the pin 13 which is rigidlysecured to the web 6 by screw thread 38. The section 18 is provided witha cylindrical portion 39 mounted upon the cylindrical portion 86, theparts being adapted for relative rotation and for rotation on the pin13. The section 18 is furthermore provided with an extension or arm 10projecting downwardly from the cylindrical portion 39 and working in aslot 411 formed by the guide piece 42 secured by bolts %3 to the web (5.This extension working in the guide tends to retain the section 18 inproper position, notwithstanding the strains to which it is subjectedand to strengthen it. The section 18 is furthermore provided on thesleeve 39 with a downwardly extending projection or portion 4% which isbehind and arranged centrally of the section 19. The section 19 isprovided with the laterally extending arms 45, i6, which extend to thesides of the projecting portion lat, and which are provided with the setscrews 47, 48, adapted to engage depressions in the end of the part ll.It will be observed that by adjusting the screws 47, 48, the angularrelations of the sections 18 and 19 may be varied, and that thereforethe movement which is imparted to the clutch band 7 may be regulated andthe parts may be adjusted to give exactly the amount of motion desired.

On the end of the cylindrical portion 19 of the fly wheel I preferablyplace a dust guard 50 made in the shape of a plate extending over theclutch mechanism and having at its central part a cylindrical exten sion51 which surrounds the driven shaft 1 and the sleeve 26. lVithin thiscylindrical portion 51 a disk 52 is secured to the flange 28 so as toaccurately fit and close the cylindrical opening. It will be understoodthat the disk 52 moves longitudinally within the cylindrical portion 51when the sleeve 26 is moved. It may be made in two sections to fitaround the sleeve.

The clutch is normally thrown to clutching position by means of thespring 31. By operating the lever 29, which is usually a foot operatedlever, the collar 28 is moved to the right, and the parallel sided cammembers 24, 25 will swing a lever 12 about the pin 13 as an axis in aclockwise direction so as to unclutch the band 5 from the brake surfaces. hen the clutch is released the spring 31 will, through the train ofmechanism described, move the lever 12 in a counter-clockwise directionso as to clutch the band 5 to the brake surface 4.

Having thus described the invention, what is claimed is:

1. In a device of the class described the combination with a rotatableshaft, of a split ring clutch carried thereby, a pivoted arm connectedat one end to contract and expand said split ring and having its otherend bifurcated. and a sleeve slidably mounted on said shaft providedwith parallel inclined surfaces upon opposite sides engaging saidbifurcated end to turn the arm upon its pivot.

2. In a device of the class described, the combination with a rotatableshaft, of a split ring clutch carried thereby, a pivoted arm mounted torotate with said shaft and connected at one end to contract and expandsaid split ring, a forked extension at the other end of said armembracing the shaft. a sleeve within the forked extension mounted torotate with but slide longitiulinally of said shaft, and parallellongitudinal inclined surfaces upon opposite sides of said sleeveengaging said forked extension to move it.

3. In a device of the class described, the

combination with a rotatable shaft, of a split ring clutch carriedthereby, a pivoted arm connected at one end to contract and expand saidsplit ring and having its other end bifurcated, a sleeve slidablymounted on said shaft provided with parallel inclined surfaces uponopposite sides engaging said bifurcated end to turn the arm upon itspivot, a spring on said shaft tending to move said sleeve in onedirection, and manual operated means for moving it in the otherdirection.

4-. In a device of the class described, the combimition with a rotatableshaft, of a split ring clutch carried thereby. a pivoted arm connectedat one end to both contract and expand said split ring when turned uponits pivot, means engaging the other end of said arm for turning it, andmeans for arying the angular relation of the ends of said arm.

In a device of the class described, the combination with a rotatableshaft, of a split ring clutch carried thereby. a pivoted arm connectedat one end to both contract and expand said split ring when turned uponits pivot, means engaging the other end of said arm for turning it, andmeans adjacent the pivot for securing the two ends of said arm togetherin different adjusted angular positions.

6. In a device of the class described, the (:on'ibination with arotatable shaft. of a split ring clutch, a lateral support for saidclutch carried by said shaft, an arm formed in two sections pivotallyconnected together and to said support, nnans for coni'iecting saidsections together so that they will turn together on the pivot, meansfor adjusting said sections relatively and for locking said L sectionsin adjusted position. connections upon one section for operating theclutch, and means engaging the other section for turning the arm uponits pivot.

7. In a device of the class described, the combination with a rotatableshaft, of a split ring clutch, a lateral support for said clutch carriedby said shaft, an arm formed in two sections having transversetelescoping pivotal connection, means for adjusting too itlfi lltl andretaining said sections i n different angular positions, means forpivotally mountiug said arm upon the support, connections at one end ofsaid arm for operating the clutch, and means at the other end for turning the arm upon its pivot.

8. In a device of the class described, the combination with a rotatableshaft, of a split ring clutch, a lateral support for said clutch carriedby said shaft, an arm formed in two sections having transversetelescoping pivotal connection, means for adjusting and retaining saidsections in different an gular positions, a pivot pin passing throughsaid pivotal connection and pivotally securing said arm to the lateralsupport, connections at one end of said arm for operating the clutch,and means at the other end for turning the arm upon its pivot.

9. In a device of the class described, the combination with a rotatableshaft, of a split ring clutch, a lateral support for said clutch carriedby said shaft, an arm formed in two sections having transversetelescoping pivotal connection, an extension on one section, screwscarried by the other section and engaging said extension to adjust thesections to different angular positions, a pivot pin passing throughsaid pivotal con nection and pivotally securing said arm to the lateralsupport, connections at one end of said arm for operating the clutch,and means at the other end for turning the arm upon its pivot.

10. In a device of the class described, the combination with a rotatableshaft, of a split ring clutch, a lateral support for said clutch carriedby said shaft, an operating arm pivoted to said support, means engagingone end of said arm for turning it upon its pivot, a screw threaded linkarm pivotally connected to said arm at the other end, and a transversepivot pin secured to the free end of said split ring clutch providedwith a screw threaded opening to receive said screw threaded link arm.

11. In a device of the class described, the combination with a splitring clutch anchored at one end, of a swinging operating arm, a pinmounted in bearings at the free end of said split ring clutch andprovided with a transverse screw threaded opening, and a link armpivotally secured to said swinging arm and provided with a screwthreaded end engaging the screw threads of said opening in the pin.

12. In a device of the class described, the combination with a support,of a pivot pin secured thereto, an arm having a cylindrical bearingsurrounding said pin, a second arm having a cylindrical bearingsurrounding the bearing of the first arm, and means for securing saidarms together in adjusted position whereby they will rotate together onsaid pin.

13. In a device of the class described, the combination with a support,of a pivot pin secured thereto, an arm having a cylindrical bearingsurrounding said pin, a sec ond arm having a cylindrical bearingsurrounding the bearing of the first arm, an extension on one arm, abifurcated section of the second arm embracing the extension of thefirst arm, and adjusting bolts in said bifurcated section engaging saidextension.

14. In a device of the class described, the combination with a support,of a pivot pin secured thereto, an arm having a cylindrical bearingsurrounding said pin a second arm having a cylindrical bearingsurrounding the bearing of the first arm a bifurcated section on one armembracing a portion of the other arm, and adjusting bolts in saidhifurcated section for securing said arms together.

15. In a device of the class described, the combination with a support,of a pivot pin secured thereto, an arm having a cylindrical bearingsurrounding said pin, a second arm having a cylindrical bearingsurrounding the bearing of the first arm, a bifurcated section on onearm embracing a portion of the other arm, adjusting bolts in saidbifurcated section for securing said arms together, a guide on saidsupport, and an extension on one of said arms working in said guide.

16. In a device of the class described, an operating arm made in twosections having transverse telescoping portions pivotally securing themtogether, a projection on one of said telescoping sections embraced by abifurcated portion of the other arm, and adjusting means for securingsaid projection and bifurcated portion in different angular positions.

17. In a device of the class described, the combination with a. pivotedoperating arm having a forked end, a parallel sided operating camworking in said forked end, rollers on said end engaging opposite sidesof said cam, and adjustable eccentric bearings for said rollers.

18. In a device of the class described, the combination with a rotaryshaft, of a clutch drum secured thereto by a web, a clutcli band carriedby said drum, an operating arm having a bifurcated end pivoted to saidweb, and a slidable sleeve on said shaft having parallel sided camsurfaces engaging said bifurcated end, the said web being provided withopenings to receive the ends of said cam surfaces.

19. In a device of the class described, the combination of a shaft, awheel, a clutch member carried by the shaft and adapted to engage saidwheel, a lever for shifting the clutch member having a bifurcated memberembracing the shaft, and a sleeve movable longitudinally on the shaftthrough said biij'urcated section of the lever and provided with meansto positively rook said lever in opposite directions to engage ordisengage the clutch member and wheel.

20. In a device of the class described, the combination of a shaft, awheel, a clutch member carried by the shaft and adapted to engage saidwheel, a lever for shifting the clutch member having a bifurcated memberembracing the shaft, and a sleeve movable longitudinally on the shaftand provided between the members ofthe bifurcated section i i oi saidlever with diametrieally oppositely arranged, parallel, longitudinallyinclined surfaces, whereby the lever \\'Ill be positively moved inopposite directions by reciprocalion of the sleeve.

In testimony whereof I allix my signature in presence of two witnesses.

RU S S E LL H U FF.

\Vitnesses l'lowhnn Ilammnss,

N. I'IEARN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

